Description

Polyphenyl Ether CAS NO 31533-76-3 is a high-performance synthetic fluid belonging to the class of aromatic ethers, characterized by its exceptional thermal and oxidative stability. This chemical is crucial for demanding industrial applications where reliability under extreme conditions is non-negotiable. It is primarily sought after by manufacturers in the aerospace, electronics, and specialty lubricant sectors for its unique combination of low volatility and high-temperature performance.

Application

• High-Temperature Heat Transfer Fluids: Used in closed-loop systems for solar thermal power plants and chemical processing due to its excellent thermal stability.
• Diffusion Pump Fluids: Serves as a working fluid in high-vacuum diffusion pumps for semiconductor manufacturing and analytical instrumentation.
• Aerospace Lubricants & Greases: A key base fluid or additive in lubricants for aircraft engines and components exposed to wide temperature ranges.
• Electronic Cooling: Employed in direct immersion cooling for high-power density electronics and transformers.
• Nuclear Reactor Coolants: Investigated and used in specialized nuclear applications for its radiation resistance.
• High-Temperature Hydraulic Fluids: Formulated into fire-resistant hydraulic fluids for industrial machinery operating in hot environments.
• Polymer & Resin Additive: Acts as a plasticizer or processing aid to enhance the thermal properties of high-performance polymers.

Basic Information

Product Name	Polyphenyl Ether
CAS No.	31533-76-3
Molecular Formula	C18H14O
Molecular Weight	246.30 g/mol
Synonyms	1,1'-[1,1'-Biphenyl]-4,4'-diylbis(oxy)bisbenzene; 4,4'-(Oxydi-4,1-phenylene)diphenyl ether; Bis(4-phenoxyphenyl) ether; Five-ring polyphenyl ether; PPE; Santovac 5; OS-124; Therminol VP-1; Dowtherm A (related mixture); Aromatic Ether Fluid
EINECS	250-665-1

Quality Control

Our Polyphenyl Ether is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing, including gas chromatography (GC) and infrared spectroscopy (IR), to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing specific batch results are provided and traceable to relevant industry standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from strong acids and organic solvents. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F). Keep container tightly sealed when not in use to minimize moisture absorption and contamination.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.05%
Density at 25°C	1.18 - 1.22 g/mL
Viscosity at 25°C	Contact for details
Pour Point	< -15 °C
Flash Point	> 200 °C

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.